Gurobi 5.0.1 (linux64) logging started Fri Nov 16 07:08:42 2012 Optimize a model with 10980 rows, 3782 columns and 36478 nonzeros Presolve time: 0.09s Presolved: 10980 rows, 3782 columns, 36797 nonzeros Variable types: 0 continuous, 3782 integer (3782 binary) Found heuristic solution: objective 37.0000000 Root relaxation: objective 2.000000e+00, 3623 iterations, 0.09 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 122 37.00000 2.00000 94.6% - 0s H 0 0 15.0000000 2.00000 86.7% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 1s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 5s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 9s 0 0 2.00000 0 122 5.00000 2.00000 60.0% - 14s H 0 0 4.0000000 2.00000 50.0% - 15s 0 0 2.00000 0 122 4.00000 2.00000 50.0% - 18s 0 0 2.00000 0 122 4.00000 2.00000 50.0% - 22s 0 2 2.00000 0 122 4.00000 2.00000 50.0% - 39s 1 3 3.00000 1 611 4.00000 2.00000 50.0% 79039 65s 2 4 3.00000 1 700 4.00000 3.00000 25.0% 47248 71s 28 6 3.00000 3 363 4.00000 3.00000 25.0% 3873 75s 46 8 3.00000 5 106 4.00000 3.00000 25.0% 2768 80s 57 5 3.00000 4 148 4.00000 3.00000 25.0% 2642 85s 90 2 3.00000 3 645 4.00000 3.00000 25.0% 1933 90s Cutting planes: Clique: 167 Zero half: 2 Explored 105 nodes (250689 simplex iterations) in 93.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%